The following example teaches you how to determine if the Windows license you are running on computer your type is OEM, Retail, or Volume.
When you are going to buy a license of Windows, there are a number of different ways to do it. Depending on how you choose the licenses and other price, they also have different rights, constraints and names. The most common types of licenses are Retail (FPP (Full Packaged Product)), OEM (Original Equipment Manufacturer), and Volume Licensing.
For more information, see this one Microsoft link
Volume Licensing
They are aimed at companies of all sizes that wish to purchase at least 5 software licenses by choosing one of the flexible pricing schemes, simplifying the management of the user licenses and enjoying additional advantages depending on the product (e.g. portability of licenses, right to downgrade and use older versions, etc.).
Pre-installed software (OEM / DSP)
Pre-installed software is available in DSP / OEM format and is designed to (a) pre-install on new PCs and servers exclusively from computer / server manufacturers for resale, or (b) accompany the computer or server originally installed by its manufacturer (System Builder or OEM Manufacturer)
Retail Packages (Retail / FPP)
Retail / FPP (Full Packaged Products) Retail Packages are available through retail outlets, both for home users and small businesses up to 10 PCs. They allow the installation and use of the software on 1 device. The package includes the key to activate the product and a storage or link to an online installation site.
But let's now look at how to understand if your Windows is turned on as Retail, OEM, or Volume.
1. Open a command prompt. To do this press the Win + R keys at the same time and in the window implementationWhen it appears, type the word "cmd" and press Enter
2. Type the following command at the command prompt, and then press Enter.
slmgr -dli
3. After a short interval of 5 seconds the Windows Script Host dialog will appear showing what type of license you are running. (See them below pictures):
